UBUNTU-CVE-2020-15166

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    UBUNTU-CVE-2020-15166

    Published: 11 Sept 2020Last Modified: 22 Apr 2026
    Upstream:
    CVE-2020-15166
    Aliases:
    USN-4920-1

    Summary:

    Details: In ZeroMQ before version 4.3.3, there is a denial-of-service vulnerability. Users with TCP transport public endpoints, even with CURVE/ZAP enabled, are impacted. If a raw TCP socket is opened and connected to an endpoint that is fully configured with CURVE/ZAP, legitimate clients will not be able to exchange any message. Handshakes complete successfully, and messages are delivered to the library, but the server application never receives them. This is patched in version 4.3.3.

    References: https://ubuntu.com/security/CVE-2020-15166, https://www.openwall.com/lists/oss-security/2020/09/07/3, https://github.com/zeromq/libzmq/security/advisories/GHSA-25wp-cf8g-938m, https://github.com/zeromq/libzmq/commit/e7f0090b161ce6344f6bd35009816a925c070b09, https://ubuntu.com/security/notices/USN-4920-1, https://www.cve.org/CVERecord?id=CVE-2020-15166

    Affected packages

    Package

    Name: zeromq3

    Purl: pkg:deb/ubuntu/[email protected]+dfsg-2ubuntu0.1+esm2?arch=source&distro=trusty/esm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.0.4+dfsg-2ubuntu0.1+esm2

    Affected versions

    3.2.3+dfsg-2
    3.2.4+dfsg-1
    3.2.4+dfsg-2
    3.2.4+dfsg-3
    3.2.4+dfsg-4

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High